SEUZACH Wastewater Treatment Plant, Oberohringen, Zürich, Switzerland

The SEUZACH wastewater treatment plant is located in Oberohringen, a locality within the municipality of Seuzach in the canton of Zürich, Switzerland. It serves a population of approximately 6,875 people, classifying it as a small to medium agglomeration under Swiss and EU regulatory frameworks. Switzerland, though not an EU member, aligns its wastewater treatment standards with the EU Urban Waste Water Treatment Directive (91/271/EEC). For agglomerations of this size, secondary treatment is typically required, and in sensitive areas, tertiary treatment may be mandated. The plant's designed capacity is 1.00, indicating its operational scale. The treated effluent is discharged into the local watershed, which ultimately drains into the Rhine River basin. The Rhine is a major European waterway that flows into the North Sea, supporting diverse aquatic ecosystems and serving as a critical water resource for multiple countries.

The plant discharges into the local catchment that feeds the Rhine River basin. The Rhine flows through Switzerland, Germany, and the Netherlands before reaching the North Sea. This watershed supports diverse aquatic life and is an important migratory corridor for fish species. The region's water quality is closely monitored to protect downstream ecosystems and drinking water supplies.